Looking at the opcodes and operands generated you can see that the
initial '0000' or 'FFFF' (extended data) is only used to distinguish
between two different opcodes, and the data used is actually only
1234H.

Important information

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers of your data.